When you check in for the first time, you cannot pass through the door in the correct path.
You shouldn't ask the security guard to open the door, but you should go in together when someone else passes the door. We were very embarrassed when we first arrived at the accommodation because of the host's request. And it took a long wait for someone else to come.
However, after receiving the key, I was able to move freely. Everything was satisfactory except for the check-in process.